DRACOCEPHALUM DYCKIA. 



115 



distinct species, somewhat resembling 

 a Betonica in habit, 3 to 12 in. high. 

 Flowers, in summer; fine blue, in 

 whorled oblong spikes, 2 or 3 in. long ; 

 segments of calyx equal ; corolla 

 nearly 2 in. long, 3 times the length of 

 calyx. Leaves, of root, oblong, obtuse, 

 heart-shaped at the base, on long 

 stalks; stem-leaves ovate, on short 

 stalks ; floral leaves oblong, deeply 

 toothed. Siberia, frequent on the Al- 

 taian Alps. The rock-garden or the 



margins of borders, always in good 

 sandy loam, and in a thoroughly well- 

 drained soil. This plant is now, and 

 has long been, very uncommon in 

 gardens, and deserves a favourable 

 position till sufficiently increased. 

 Careful division and seed. 



Dracocephalum peregrinnm (Twin- 

 flowered JD.) A decumbent species, 

 with bracts and leaves furnished 

 with sharp-pointed teeth ; about 1 

 ft. high. Flowers, in summer; blue, 

 1 to 14 in- long, in pairs both turned 

 the same way, in few-flowered 

 whorls ; corolla about 3 times as long 

 as the calyx. Leaves, lance-shaped, 

 resembling those of Hyssop or .Rose- 

 mary, somewhat hoary beneath, about 

 an inch long, deeply toothed; floral 

 leaves linear-lanceolate, somewhat 



spiny. Siberia. Borders, and the 



rougher parts of the rock-garden, in 

 light well-drained soil. Seed and 

 division. 



Dracocephalum Ruyschianum (Hys- 

 sop-leaved D.) A handsome species, 

 12 to 18 in. high. Flowers, in summer ; 

 purplish, blue, about an inch long ; 

 about 6 flowers at the top of each 

 stem ; calyx pubescent, half as long 

 as the corolla. Leaves, linear-lanceo- 

 late, entire, smooth, 1 to 2 in. 

 long ; floral leaves ovate-lanceolate ; 

 stems branched from the base, 

 pubescent. Europe and Russian Asia. 



Borders, and the rock-garden, in 



light warm soil. Seed and division. 



Dryas Drummondi (Drummond'a 

 Avens). A dwarf, hardy, evergreen 

 trailer, with flower- stems from 3 to 

 8 in. high. Flowers, in summer ; golden 

 yellow, about 1 in. across ; calyx 

 densely covered with blackish glandu- 

 lar hairs. Leaves, oval, scalloped on the 

 margin, stalked, white and downy 



underneath. North America. 



A pretty rock plant, easily grown in 

 any free soil, and also suited for the 

 margins of borders, edges of beds of 

 American plants, etc. It is very un- 

 common in gardens, but thrives quite 

 as well in sandy soil as the common 

 Mountain Avens. Division. 



Dryas octopetala (Mountain Avens). 

 A prostrate or creeping evergreen 

 herb, forming dense spreading tufts. 

 Flowers, in summer ; white, with 

 yellow stamens, an inch or more 

 across, on erect peduncles, 3 to 8 in. 

 high ; fruit with a feathery appendage 

 an inch long, like those of Anemone. 

 Leaves, oblong, green, smooth and 

 shining above, white and downy be- 

 neath, deeply crenate, about ^ in. 

 long. Europe, Britain, and North 



America. Borders and edgings, in 



peaty or very sandy soil, or on 

 rockwork, in somewhat moist spots. 

 It looks very pretty, drooping over 

 the brows of rocks. Division. 



Dyckia rariflora (Hardy DycUa). 

 An interesting plant of a tropical 

 family (Bromelia), which, Major Trevor 

 Clarke informs me, has lived out of 

 doors and flowered in his garden for 

 some years ; 2 ft. high. Flowers, in 

 summer ; orange-coloured, and very 

 showy, in panicles, with spiny bracts, 

 Leaves, radical, lance-shaped, pointed, 

 narrow.markedwithlongitudinallines, 

 whitish underneath, and disposed in 



a rosette. Brazil. Warm, sheltered, 



and dry nooks of the rock-garden, 

 in well-drained, sandy loam. Seed. 



Echinacea angustifolia (Narrow* 

 eaved .#.) A perennial of distinct 

 I 2 



